yancya

function times(n) {
  const iterator = (function* gen(n) {
    let count = 0;
    while (count < n) {
      yield count;
      count++;
    }
  })(n);
  return Array.from(iterator);
}

yancya

SELECT *
  FROM UNNEST(ARRAY<STRUCT<`name` string, `group` string, age INT64>>[
         ('a', 'A', 10),('b', 'A', 11),('c', 'A', 12),
         ('f', 'B', 20),('e', 'B', 10),('d', 'B', 11)
       ])
  )
  SELECT `group`, `age`, COUNT(DISTINCT `name`)
    FROM t
GROUP BY ROLLUP(1, 2)
ORDER BY 1, 2;

yancya

require 'with_resources/toplevel'
using WithResources::TopLevel

resources = -> () {
  hello = StringIO.new('Hello')
  world = StringIO.new('World')
}

with(resources) do |hello, world|
  puts "#{hello.gets}, #{world.gets}"

yancya

require 'tapp'

def main(str)
  x, y, b = str.split(',').map(&:to_i)

  x_size = x.to_s(b).size

  min = if x_size.odd?
          (1..((b-1).to_s*(x_size / 2 + 1)).to_i(b)).flat_map { |n| check(n, b) }.uniq.select { |_n| _n < x }.size
        else

yancya

# columns example
# [
#   ['hoge total', 'hoge'],
#   ['fuga total', 'fuga'],
#   ['piyo total', 'piyo'],
# ]
def cube_select_expressions(columns)
  [true, false].repeated_permutation(columns.size).map { |flags|
    flags.zip(columns).map { |flag, (total_label, column_name)|
      flag ? column_name : "'#{total_label}' AS #{column_name}"

yancya

def main(str)
  n = str.to_i
  n3 = '0' + n.to_s(3)

  nums = case n3
         when /0$/
           [
             n3.sub(/20+$/) { |m| '0' + '2' * (m.size - 1) }.to_i(3),
             n3.sub(/10+$/) { |m| '0' + '1' * (m.size - 1) }.to_i(3),
             n + 1,

yancya

import { Observable, Subject } from 'rxjs';

const subj = new Subject();

subj.take(10).
  startWith([1, 1]).
  scan(([a, b], _) => [b, a + b]).
  do(([a, b]) => console.log(a)).
  subscribe();

yancya

const { Observable } = require('rxjs');

const streams = Array(10).fill(null).map(_ => {
  const f = Math.random();
  console.log(f);
  return Observable.of(f).delay(f * 100);
})

Observable.
  race(...streams).

yancya

const { Observable } = require('rxjs');

const n$ = new Observable.range(0, 100);
const fizz$ = n$.map(n => n % 3 == 0 ? 'Fizz' : '');
const buzz$ = n$.map(n => n % 5 == 0 ? 'Buzz' : '');

Observable.
  zip(n$, fizz$, buzz$).
  map(([n, fizz, buzz]) => fizz + buzz || n).
  do(console.log).

yancya

const { Observable } = require('rxjs');

new Observable.range(0, 100).
  map(n => [n]).
  map(a => a.concat([a[0]%3 == 0 ? 'Fizz' : ''])).
  map(a => a.concat([a[0]%5 == 0 ? 'Buzz' : ''])).
  map(([n, fizz, buzz]) => fizz + buzz || n).
  do(console.log).
  subscribe();